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The Second Heart Sound in Left Anterior Hemiblock
Author(s) -
PISUTHAARD PORNCHAI,
FEIGEN LARRY,
RAO DODDA B.,
LUISADA ALDO A.
Publication year - 1974
Publication title -
journal of the american geriatrics society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.992
H-Index - 232
eISSN - 1532-5415
pISSN - 0002-8614
DOI - 10.1111/j.1532-5415.1974.tb05413.x
Subject(s) - medicine , sound (geography) , right bundle branch block , cardiology , electrocardiography , anatomy , audiology , acoustics , physics
The second heart sound was studied in 43 old people in order to ascertain whether left anterior hemiblock (LAHB) caused any change in the sequence of and the interval between the components of this sound. The second sound in LAHB was compared with that in subjects with a normal electrocardiogram, and the second sound in right bundle‐branch block (RBBB) plus LAHB was compared with that in uncomplicated RBBB. Despite a slight trend toward a narrower degree of splitting (later A component) in LAHB, the difference did not prove statistically significant. Thus LAHB seems to cause no dynamic changes affecting the second heart sound.